CN101291544B - Method and system connecting roaming terminal and PDSN of home location - Google Patents
Method and system connecting roaming terminal and PDSN of home location Download PDFInfo
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- CN101291544B CN101291544B CN2008101270360A CN200810127036A CN101291544B CN 101291544 B CN101291544 B CN 101291544B CN 2008101270360 A CN2008101270360 A CN 2008101270360A CN 200810127036 A CN200810127036 A CN 200810127036A CN 101291544 B CN101291544 B CN 101291544B
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Abstract
The invention provides a method and a system for connecting a roaming terminal and home-location pack data service nodes. When the roaming terminal roams to a visited place, the connection between the roaming terminal and the visited place PDSN is established through a wireless network; a point-to-point protocol link control flow and a point-to-point protocol authentication flow between the roaming terminal and the visited place PDSN are initiated; an IP address of a home-location PDSN is obtained through the visited place PDSN; the visited place PDSN sends registration information defined by a PP interface to the home-location PDSN so as to establish PP connection between the visited place PDSN and the home-location PDSN; and the visited place PDSN returns the received IP address to the roaming terminal so as to establish the connection between the roaming terminal and the home-location PDSN. The method utilizes a service data transmission channel provided by the PP connection to establish the connection between the roaming terminal and the home-location and transmit the data of the roaming terminal back to the home-location.
Description
Technical field
The present invention relates to CDMA2000 (CDMA 2000) network technology, relate in particular to the method and system that between roaming terminal and ownership place Packet data service service node (PDSN), connects in the CDMA2000 network.
Background technology
In CDMA2000 shown in Figure 1 (CDMA 2000) network architecture, Packet data service service node (PDSN) links to each other with wireless network (RN) by RP (Radio with between PDSN) interface, and RN links to each other with access terminal (AT) by air interface (Air Interface).Wireless network comprises base station (BS) and group control of functional node (PCF), and by air interface and terminal interaction, the assurance terminal still can be used network when mobile.PDSN provides the ability of access (Internet) to terminal, comprises to terminal IP (the Internet agreement is referring to RFC791) address being provided and transmitting packet between Internet and terminal.
Fig. 2 has further provided the protocol stack of each network node in terminal is linked into Internet by wireless network and PDSN the process.Terminal is sealed IP and is contained in PPP (peer-peer protocol, referring to RFC1548 and RFC1661) in the frame, then the PPP frame is packaged into the form of link access control layer (LAC) and medium access control preparative layer (MAC) definition, sends to RN by the form that the airlink layer needs by air interface by MAC at last.RN carries out format conversion with the frame that receives, and the form that changes into the RP interface definition sends to PDSN.PDSN is reduced into the form of PPP frame with frame, sends to Internet after further being reduced into the form of IP bag.The network architecture of CDMA and the definition of each layer protocol can be with reference to standards such as 3GPP2X.S0011, A.S0011 and A.S0017.
Fig. 3 has provided the connection of passing through the PP interface between Serving PDSN and the Target PDSN.The PP interface is used for quick switching (Fast Handoff) in the CDMA2000 network.Switch (Handoff) and be meant the process that the airlink between terminal and the base station is switched to another airlink of the airlink of another base station or same base station.If switching (Handoff) has taken place in terminal when using business, be that terminal has moved to new wireless network (Target RN) from original wireless network (Serving RN) when being in activated state, and Target RN is merely able to be connected to new PDSN (Target PDSN) and can not be connected to is providing serving PDSN (Serving PDSN), the quick switching flow of network-triggered this moment connects with the PP interface between TargetPDSN and the Serving PDSN.
When roaming takes place in terminal in communication process, if with Serving PDSN in the standard P P call flow and ownership place (the signatory place of user and operator is an ownership place) PDSN correspondence, with Target PDSN in the standard P P call flow and visit ground (place that the user moves to is visit ground) PDSN correspondence, after then roaming terminal roams into visit ground, continue the business that the use ownership place provides if desired, system can require user's data is forwarded to PDSN of home location from visit ground PDSN.In the CDMA2000 network, guarantee that the scheme in the data recurrence possession of roaming terminal is with mobile IP (Mobile IP) technology, referring to 3GPP2X.S0011 standard and RFC3344.But mobile IP lacks support to new multiple service instances that proposes and enhanced service quality new technologies such as (QoS) in the CDMA2000EVDO network.And the PP interface of prior art guarantees that the user do not interrupt in the business that moving process uses when only being used for switching fast, and the support that the data of roaming terminal is returned the possession can not be provided.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and system that connects roaming terminal and ownership place, utilized PP that the business data transmission passage that provides is provided, set up being connected between roaming terminal and the ownership place, realize the data of roaming terminal are sent it back ownership place.
The method that connects roaming terminal and ownership place Packet data service service node, may further comprise the steps: when roaming terminal roams into visit ground, make a call and set up airlink with wireless network by air interface, user on-line notification connects between wireless network and the visit ground Packet data service service node; Initiate peer-peer protocol ppp link control flow and peer-peer protocol PPP authorizing procedure between roaming terminal and the visit ground Packet data service service node; Obtain the IP address of ownership place Packet data service service node by visit ground Packet data service service node; Visit ground Packet data service service node sends the registration message of PP interface definition to described ownership place Packet data service service node, set up with described ownership place Packet data service service node between PP be connected; Visit ground Packet data service service node is described roaming terminal distributing IP address by PPP IP address control flow, sets up being connected of roaming terminal and ownership place Packet data service service node.
In addition, the operation that obtains the IP address of ownership place Packet data service service node by visit ground Packet data service service node can comprise: deposit one or more address mapping table in advance in visit ground Packet data service service node, comprise the mapping relations between the IP address of user's global mobile user identification and ownership place Packet data service service node in this address mapping table; Read RP by visit ground Packet data service service node and connect global mobile user identification in the registration message when setting up, inquiry is pre-stored in the IP address of ownership place Packet data service service node corresponding with global mobile user identification in the address mapping table of visit ground Packet data service service node.
In addition, the operation that obtains the IP address of ownership place Packet data service service node by visit ground Packet data service service node can comprise: deposit one or more address mapping table in advance in the ownership place authentication and authorization charging server, comprised the mapping relations between the IP address of user ID and ownership place Packet data service service node in this address mapping table; In the PPP authorizing procedure, send the request of access to visit ground authentication and authorization charging server by described visit ground Packet data service service node, comprise user ID in the described access request message, and described access request is transmitted to the ownership place authentication and authorization charging server by described visit ground authentication and authorization charging server; Receive described access request by the ownership place authentication and authorization charging server, inquiry is pre-stored in the IP address of ownership place Packet data service service node corresponding with described user ID in the local address table, and by described visit ground authentication and authorization charging server with the IP address of described ownership place Packet data service service node Packet data service service node with sending to described visit.
In addition, obtain the operation of the IP address of ownership place Packet data service service node by visit ground Packet data service service node, can also comprise: relatively whether its own IP address is identical with the IP address of ownership place Packet data service service node for visit ground Packet data service service node, if identical, then visit ground Packet data service service node directly and roaming terminal connect; If different, then continue described visit ground packet data serving node and described ownership place packet data serving node and set up the PP step of connecting.
In addition, when visit ground Packet data service service node set up with described ownership place Packet data service service node between PP when being connected, can also comprise: wrap by visit ground Packet data service service node reduction PPP frame and IP, and the IP bag is sent to ownership place Packet data service service node.
In addition, described method can also comprise the operation that discharges connection: described roaming terminal discharges the session connection with described visit ground Packet data service service node; Discharge and being connected of described ownership place Packet data service service node by described visit ground Packet data service service node; Discharge and being connected of wireless network by described visit ground Packet data service service node; Discharge and being connected of described roaming terminal by wireless network.
Connect the system of roaming terminal and ownership place Packet data service service node, comprising:
Connection between the ground Packet data service service node is set up and visited to roaming terminal by wireless network, and and described visit ground Packet data service service node between initiation point-to-point protocol controlling links flow process and authorizing procedure; Ownership place Packet data service service node is used to set up and visits being connected of ground Packet data service service node; Visit ground Packet data service service node comprises: address acquisition module is used to obtain the IP address of ownership place packet data serving node; Transceiver module, be used for sending the registration message of PP interface definition to described ownership place Packet data service service node, PP between foundation and the ownership place Packet data service service node connects, and the IP address that will be used to insert in the control flow of address returns to roaming terminal, sets up being connected of described roaming terminal and described ownership place packet data serving node.
In addition, described system can also comprise: visit ground authentication and authorization charging server, be used for when receiving the access request of described visit ground Packet data service service node, described access request is transmitted to the ownership place authentication and authorization charging server, comprises user ID in the described access request message; Be used to receive the IP address of the described ownership place Packet data service service node that the ownership place authentication and authorization charging server returns, and send to described visit ground Packet data service service node; The ownership place authentication and authorization charging server is used to pre-deposit one or more address mapping table, has comprised the mapping relations between the IP address of user ID and described ownership place Packet data service service node in this address mapping table; Be used for being pre-stored in the IP address of the local address mapping table ownership place Packet data service service node corresponding, and send to visit ground authentication and authorization charging server with described user ID according to the access request inquiry that described visit ground authentication and authorization charging server sends.
In addition, described visit ground Packet data service service node can comprise: module is preserved in the address, be used to pre-deposit one or more address mapping table, comprised the mapping relations between the IP address of user's global mobile user identification and ownership place Packet data service service node in this address mapping table; The address lookup module, be used for reading the global mobile user identification that RP connects the registration message when setting up, inquiry is pre-stored in the IP address that ownership place Packet data service service node corresponding with global mobile user identification in the address mapping table of module is preserved in described address.
In addition, described visit ground Packet data service service node can also comprise: the address comparison module, whether be used for the comparison its own IP address identical with the IP address of ownership place Packet data service service node, if identical then direct and roaming terminal connects, otherwise the registration message that sends the PP interface definition is to ownership place Packet data service service node, and the PP that sets up between visit ground Packet data service service node and the ownership place Packet data service service node connects.
In addition, described visit ground Packet data service service node can also comprise: parsing module, be used for visit ground Packet data service service node set up with described ownership place Packet data service service node between PP when being connected, resolve reduction PPP frame and IP bag, and the IP bag is sent to ownership place Packet data service service node.
In addition, described system can also comprise: described roaming terminal discharge with described visit being connected of Packet data service service node, and being connected of release and wireless network; Described visit ground Packet data service service node discharges and being connected of described ownership place Packet data service service node and being connected of release and wireless network.
Visit in session connection system ground Packet data service service node comprises: address acquisition module is used to obtain the IP address of ownership place packet data serving node; Transceiver module, be used for sending the registration message of PP interface definition to described ownership place Packet data service service node, PP between foundation and the ownership place Packet data service service node connects, and the IP address that will be used to insert in the control flow of address returns to roaming terminal, sets up being connected of described roaming terminal and described ownership place packet data serving node.
In the prior art, the assurance user was not interrupted in the business that moving process uses when the PP interface only was used for switching fast, the data of roaming terminal was returned the support in possession.The present invention is in trigger condition and flow process by change PP interface, setting up PP according to the IP address of the PDSN of home location that obtains with PDSN of home location by visit ground PDSN is connected, and will be that described roaming terminal IP address allocated sends to roaming terminal by PPPIP address control flow, set up being connected of roaming terminal and described ownership place thus.Thereby utilize the transmission channel that PP connects provides business datum, realize the data of roaming terminal are sent it back ownership place.
Description of drawings
Fig. 1 illustrates the network configuration of CDMA2000 in the prior art.
Fig. 2 illustrates the protocol stack of terminal, wireless network and each network node of PDSN in the network configuration of prior art CDMA2000.
Fig. 3 illustrates when switching fast between the Target PDSN and Serving PDSN in the prior art and connects with the PP interface.
Fig. 4 is the protocol stack of each network node when switching fast in the prior art.
Fig. 5 illustrates the processing of user data package in the standard P P interface of prior art.
Fig. 6 illustrates the protocol stack of each network node of session foundation back among the present invention.
Fig. 7 illustrates the processing of the user data package of PP interface among the present invention.
Fig. 8 illustrates the method flow diagram that connects roaming terminal and PDSN of home location among the present invention.
Fig. 9 illustrates the IP address flow chart that obtains PDSN of home location in the inventive method by visit ground PDSN.
Figure 10 illustrates the IP address flow chart that obtains PDSN of home location in another execution mode of the inventive method by visit ground PDSN.
Figure 11 illustrates the method flow diagram that connects roaming terminal and PDSN of home location in another execution mode of the present invention.
Figure 12 illustrates and discharges the method flow diagram that connects among the present invention.
Figure 13 illustrates the application example of the method for connection roaming terminal of the present invention and PDSN of home location.
Figure 14 illustrates the application example that the inventive method discharges session.
Figure 15 illustrates the system that connects roaming terminal and PDSN of home location among the present invention.
Figure 16 illustrates the system construction drawing that connects roaming terminal and PDSN of home location in another execution mode of the present invention.
Figure 17 illustrates the structure chart of visit ground PDSN in the system of the present invention.
Figure 18 illustrates the structure chart of visit ground PDSN in another execution mode of the present invention.
Figure 19 illustrates the structure chart of visit ground PDSN in another execution mode of the present invention.
Figure 20 illustrates the structure chart of visit ground PDSN in another execution mode of the present invention.
Embodiment
The present invention proposes a kind of method and system that connects roaming terminal and PDSN of home location.By keeping the parameter-definition of the PP interface between PDSN of home location and the visit ground PDSN, but change the trigger condition and the flow process of PP interface, with realization roaming terminal (Roaming) in the CDMA2000 network is linked to each other with PDSN of home location, and the data of roaming terminal are sent to PDSN of home location.
Describe the present invention in detail below in conjunction with the drawings and specific embodiments.
Fig. 4 is the protocol stack of each network node when switching fast in the prior art.Compare the PP interface between many Target PDSN and the Serving PDSN with the protocol stack that Fig. 2 provides.In standard P P call flow, Target PDSN directly receives packet from the RP interface, content to packet is not made any change, just packet header (PacketHeader) of RP interface definition is packaged into the packet header of PP interface definition and sends from the PP interface.The encapsulation process of packet as shown in Figure 5.Operation by PP interface reduction PPP frame and IP bag is finished by Serving PDSN, and the IP bag that parses is sent to Internet.Guaranteed terminal in the process that moves, the business of using can not interrupted.
Fig. 5 illustrates the processing of user data package in the standard P P interface of prior art.The RP bag of standard is divided into RP head and RP net load two parts, and wherein the RP net load comprises PPP frame and user's IP bag again.In the standard P P call flow " S " bit (not shown) among the Flags in the registration message will be put 1, notice Serving PDSN wants to send data to Serving RN and Target PDSN simultaneously.
Fig. 6 illustrates the protocol stack of each network node of session foundation back among the present invention.The protocol stack of each network node is compared during with the quick switching that defines among Fig. 4, and difference is: PPP termination sends to PDSN of home location at visit ground PDSN rather than PDSN of home location promptly by visit ground PDSN reduction PPP frame and IP bag, and with the IP bag.Because PDSN of home location receives only IP bag, then do not need to carry out and the heavily negotiations process etc. of the PPP authentication process of roaming terminal and controlling links flow process (LCP), thereby saved call duration according to the PPP frame.
Fig. 7 illustrates the processing of the user data package of PP interface among the present invention.Visit ground PDSN removes the PPP frame part of net load in the RP bag, and the packet header that is packaged into the PP interface definition then sends from the PP interface.Be 0 (not shown) with " S " bit position in the present invention.Wherein, be 0 to be to be used for distinguishing mutually with " S " bit position with standard P P call flow, should not be construed as restriction to message format in the PP call flow.
The comparative illustration of PP call flow is as can be seen among PP call flow and the present invention from above-mentioned prior art, the present invention has kept the parameter-definition of the PP interface between PDSN of home location and the visit ground PDSN, but changed the content of parameter that the PP interface transmits, promptly remove the PPP frame part of net load in the RP bag, only sent the IP packet portion of net load.Make that PDSN of home location does not need partly to carry out PPP authentication and heavily negotiations process etc. of controlling links flow process (LCP) with roaming terminal according to the PPP frame, thereby changed the trigger condition and the flow process of PP interface, saved the call duration when roaming terminal links to each other with PDSN of home location.
Fig. 8 illustrates the method flow diagram that connects roaming terminal and PDSN of home location among the present invention.May further comprise the steps:
In step 101, when roaming terminal roams into when ground visit, make a call and set up airlink by air interface with wireless network.Set up RP between wireless network and the visit ground PDSN and connect user on-line notification.
In step 102, initiate peer-peer protocol controlling links flow process and peer-peer protocol authorizing procedure between roaming terminal and the visit ground PDSN.
In step 103, obtain the IP address of PDSN of home location by visit ground PDSN.
In step 104, visit ground PDSN is according to the IP address of described PDSN of home location, and to the registration message of described PDSN of home location transmission PP interface definition, the PP that sets up between visit ground PDSN and the PDSN of home location connects.
In step 105, the IP address that visit ground PDSN will be used to insert in the control flow of PPP IP address returns to roaming terminal, sets up being connected of roaming terminal and PDSN of home location.
In the said method flow process, the operation that obtains the IP address of PDSN of home location in step 103 can realize by following manner.As shown in Figure 9, comprising:
At step 103A, in visit ground PDSN, deposit one or more address mapping table in advance, comprised the mapping relations between the IP address of user's global mobile user identification IMSI and PDSN of home location and PDSN of home location in this address mapping table.
At step 103B, visit ground PDSN reads RP and connects IMSI in the registration message when setting up, and inquiry is pre-stored in the IP address of PDSN of home location corresponding with IMSI in the address mapping table of visit ground PDSN.
In the said method flow process, the operation that obtains the IP address of PDSN of home location in step 103 can realize by following manner.As shown in figure 10, comprising:
At step 103a, in the ownership place aaa server, deposit one or more address mapping table in advance in, comprised the mapping relations between the IP address of user ID and PDSN of home location and PDSN of home location in this address mapping table, user ID is IMSI or user name for example.
At step 103b, in the PPP authorizing procedure, send the request of access to visit ground aaa server by described visit ground PDSN, comprise user ID in this access request message, and described access request is transmitted to the ownership place aaa server by described visit ground aaa server.
At step 103c, receive described access request by the ownership place aaa server, inquiry is pre-stored in the IP address of PDSN of home location corresponding with this user ID in the local address table, and by described visit ground aaa server with the IP address of described PDSN of home location PDSN with sending to described visit.
Present invention focuses on to visit ground PDSN sets up PP according to the IP address of PDSN of home location with it and is connected; though only provided the example that two kinds of interacting message modes obtain the IP address of PDSN of home location among the above embodiment; but should not be regarded as visiting the restriction that ground PDSN obtains the IP address mode of PDSN of home location, all be encompassed within protection scope of the present invention and should be considered as all feasible obtain manners.
Figure 11 illustrates the connection roaming terminal in another execution mode of the present invention and the method flow diagram of PDSN of home location.Wherein, step 101～step 103 is identical with a last execution mode, also comprises IP address step relatively in the present embodiment, begins to carry out following operation from step 104.
At step 104a, relatively whether its own IP address is identical with the IP address of PDSN of home location for visit ground PDSN, is execution in step 105b then; Otherwise execution in step 104b.
At step 104b, the registration message that visit ground PDSN sends the PP interface definition is to PDSN of home location, and the PP that sets up between visit ground PDSN and the PDSN of home location connects.
At step 105a, the IP address that visit ground PDSN will be used to insert in the control flow of PPP IP address returns to roaming terminal, sets up being connected of roaming terminal and PDSN of home location.
At step 105b, visit ground PDSN directly and roaming terminal connect.A kind of special circumstances have been considered in this embodiment, promptly visit ground PDSN and PDSN of home location have used same IP address, just can not realize professional establishment of connection with regard to not needing to set up the PP connection this moment, so visit ground PDSN is direct and roaming terminal connects.
Figure 12 illustrates and discharges the method flow diagram that connects in another execution mode of the present invention.On the basis of the above-mentioned method flow that connects, also comprise the operation that following release connects:
In step 106, described roaming terminal discharges the session connection with described visit ground PDSN;
In step 107, discharge and being connected of described PDSN of home location by described visit ground PDSN;
In step 108, discharge and being connected of wireless network by described visit ground PDSN; And
In step 109, discharge and being connected of described roaming terminal by wireless network.
Figure 13 illustrates the application example of the method for the invention, further specifies the present invention below in conjunction with this example.This method may further comprise the steps:
In step 201, when roaming terminal roams into when ground visit, make a call and set up airlink by air interface with wireless network.Set up RP between wireless network and the visit ground PDSN and connect user on-line notification.So, connect between roaming terminal and the visit ground PDSN.Visit ground and ownership place can be same operators among the present invention, also can be different operators, preserve user's CAMEL-Subscription-Information at ownership place.
In step 202, between visit ground PDSN and roaming terminal, initiate peer-peer protocol controlling links flow process (PPP LCP) and peer-peer protocol authorizing procedure (Authentication).
In step 203, the business of using ownership place to provide will be provided roaming terminal, promptly need to set up being connected of roaming terminal and ownership place, at this moment, PDSN inserts request message (RADIUS AccessRequest message to visit ground aaa server (authentication, mandate and accounting server) transmission by visit ground, referring to 3GPP2X.S0011 standard and RFC2865), in this access request message, comprise user ID.
In step 204, will insert request message by visit ground aaa server and be forwarded to the ownership place aaa server, in this access request message, comprise user ID.The inquiry of ownership place aaa server is pre-stored in the IP address of PDSN of home location corresponding with this user ID in the address mapping table, and in RADIUS Access Accept message, use " IP address allocated " parameter (Framed IP Address, radius attribute value 0 * 08) that the IP address of PDSN of home location is returned to visit ground aaa server.
In step 205, more described IP address is returned to visit ground PDSN by visit ground aaa server.
In step 206, relatively whether its own IP address is identical with the IP address of PDSN of home location for visit ground PDSN, if identical then continue follow-up call flow according to the definition of 3GPP2A.S0017 standard.If different then registration message that visit ground PDSN sends the PP interface definition is to PDSN of home location, the PP that sets up between visit ground PDSN and the PDSN of home location connects.The processing of related protocol stack and packet is referring to Fig. 6 and Fig. 7 in this step, and PPP termination sends to PDSN of home location at visit ground PDSN rather than PDSN of home location promptly by visit ground PDSN reduction PPP frame and IP bag, and with the IP bag.Because PDSN of home location receives only IP bag, then do not need to carry out and the heavily negotiations process etc. of the PPP authentication of roaming terminal and controlling links flow process (LCP), thereby saved call duration according to the PPP frame.
In step 207, initiate PPP IP address control (PPP IPCP) flow process between roaming terminal and the visit ground PDSN, visit ground PDSN will give roaming terminal by the IP address assignment that the ownership place aaa server returns.
In step 208, according to described IP address, roaming terminal and PDSN of home location successfully connect, and PDSN of home location is transmitted data between Internet and roaming terminal.
Figure 14 illustrates the application example that the present invention discharges session, and concrete steps are:
In step 210, roaming terminal is initiated PPP LCP process ends, the session connection between release and the visit ground PDSN.
In step 211, visit the PP interface release flow process of ground PDSN, the session connection between release and the PDSN of home location by PP interface initiation standard definition.
In step 212, initiate the RP interface release flow process of standard definition between visit ground PDSN and the wireless network by the RP interface.
In step 213, discharge airlink by air interface between wireless network and the roaming terminal.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Figure 15 illustrates the connection roaming terminal of the present invention's proposition and the system of PDSN of home location.Comprise roaming terminal 11, visit ground PDSN 12 and PDSN of home location 15.
Roaming terminal 11 sets up and visits the connection between the ground PDSN 12 by wireless network, and and visits between the ground PDSN and carry out ppp link control flow LCP and PPP authorizing procedure (Authentication).Visit ground PDSN 12 obtains the IP address of ownership place packet data serving node, send the registration message of PP interface definition to described ownership place Packet data service service node, PP between foundation and the ownership place Packet data service service node connects, and the IP address that will be used to insert in the control flow of address returns to roaming terminal, sets up being connected of described roaming terminal and described ownership place packet data serving node.
Figure 16 illustrates the system that connects roaming terminal and PDSN of home location in another execution mode of the present invention.Compare with embodiment illustrated in fig. 15, present embodiment has increased visit ground aaa server 13 and ownership place aaa server 14.
Visit ground PDSN 12 sends the request of access to visit ground aaa server 13, comprises user ID in this access request message, and by described visit ground aaa server 13 described access request is transmitted to ownership place aaa server 14.Ownership place aaa server 14 is used to pre-deposit one or more address mapping table, has comprised the mapping relations between the IP address of user ID and PDSN of home location and PDSN of home location in this address mapping table, and user ID is IMSI or user name for example.Ownership place aaa server 14 is pre-stored in the IP address of PDSN of home location 15 corresponding with this user ID in the local address mapping table according to described access request inquiry, and by described visit ground aaa server 13 with the IP address of described PDSN of home location PDSN 12 with sending to described visit.
Figure 17 illustrates the structure chart of visit ground PDSN in the system of the present invention.Described visit ground PDSN 12 comprises: address acquisition module 125 and transceiver module 126.
When the address mapping table between the IP address of not preserving user ID and PDSN of home location in the address acquisition module 125, then address acquisition module 125 sends the request of access to visit ground aaa server 13, comprise user ID in this access request message, and obtain the IP address of the PDSN of home location that visit ground aaa server 13 returns.Certainly, also can preserve the address mapping table between the IP address of user ID and PDSN of home location in the address acquisition module 125, will be elaborated in conjunction with Figure 18.
Figure 18 illustrates the structure chart of the ground PDSN of visit described in another execution mode of the present invention.Described visit ground PDSN 12 comprises address preservation module 121, address lookup module 122 and transceiver module 126.At this moment, address acquisition module 125 comprises address preservation module 121 and address lookup module 122.
The address is preserved module 121 and is used to pre-deposit one or more address mapping table, has comprised the mapping relations between the IP address of user's IMSI and PDSN of home location and PDSN of home location in this address mapping table.Address lookup module 122 reads RP and connects IMSI in the registration message when setting up, and inquiry being pre-stored in the IP address that PDSN of home location corresponding with IMSI in module 121 address mapping table is preserved in the address.
Figure 19 illustrates the structure chart of visit ground PDSN in the described system of another execution mode of the present invention.Described visit ground PDSN further comprises: address comparison module 123, the IP address that is used for the PDSN of home location whether the comparison its own IP address get access to address acquisition module 125 is identical, if identical then direct and roaming terminal connects, according to the follow-up call flow of definition continuation of 3GPP2A.S0017 standard.Otherwise the registration message that sends the PP interface definition is to PDSN of home location, and the PP that sets up between visit ground PDSN and the PDSN of home location connects.
Figure 20 illustrates the structure chart of visit ground PDSN in the described system of another execution mode of the present invention.Described visit ground PDSN further comprises: parsing module 124, be used for visit ground Packet data service service node set up with described ownership place Packet data service service node between PP when being connected, resolve reduction PPP frame and IP bag, and the IP bag is sent to ownership place Packet data service service node.
Another execution mode according to the present invention, described system also discharges the connection of having set up.Wherein, described roaming terminal discharge with described visit PDSN session connection and with being connected of wireless network; Described visit ground PDSN discharge with described PDSN of home location be connected and with being connected of wireless network.
Another execution mode according to the present invention, visit in session connection system ground Packet data service service node comprises: address acquisition module is used to obtain the IP address of ownership place packet data serving node; Transceiver module, be used for sending the registration message of PP interface definition to described ownership place Packet data service service node, PP between foundation and the ownership place Packet data service service node connects, and the IP address that will be used to insert in the control flow of address returns to roaming terminal, sets up being connected of described roaming terminal and described ownership place packet data serving node.
As can be seen from the above description, the present invention has different with standard at signaling plane and data surface.Wherein, not not being all on signaling plane: 1.1) have only the wireless network of generation to switch in the standard and just have the foundation of PP interface, and accessing terminal to network just may take place among the present invention; 1.2) decision sets up the PP interface, in standard relatively oneself address and the Serving PDSN that brings up of Target RN of Target PDSN, the inconsistent signaling process that just triggers, and the PDSN of home location address that to be PDSN relatively more own address in visit ground among the present invention return with visit ground aaa server, inconsistent just triggering flow process.Not not being all on data surface: 2.1) in the standard PPP frame is encapsulated on the PP interface, and the present invention is not encapsulated in the PPP frame on the PP interface, so the data format on the PP interface is had any different; 2.2) terminal and PDSN of home location do not need the heavily negotiations process that requires in the standard.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (13)
1. connect the method for roaming terminal and ownership place Packet data service service node PDSN, may further comprise the steps:
When roaming terminal roams into when ground visit, make a call and set up airlink by air interface with wireless network, user on-line notification connects between wireless network and the visit ground Packet data service service node;
Initiate peer-peer protocol ppp link control flow and peer-peer protocol PPP authorizing procedure between roaming terminal and the visit ground Packet data service service node;
Obtain the IP address of ownership place Packet data service service node by visit ground Packet data service service node;
Visit ground Packet data service service node sends the registration message of PP interface definition to described ownership place Packet data service service node, set up with described ownership place Packet data service service node between PP be connected;
The IP address that visit ground Packet data service service node will be used to insert returns to roaming terminal, sets up being connected of roaming terminal and ownership place Packet data service service node.
2. the method that connects roaming terminal and ownership place Packet data service service node PDSN according to claim 1, wherein, the operation that obtains the IP address of ownership place Packet data service service node by visit ground Packet data service service node comprises:
In visit ground Packet data service service node, deposit one or more address mapping table in advance, comprise the mapping relations between the IP address of user's global mobile user identification and ownership place Packet data service service node in this address mapping table;
Read RP by visit ground Packet data service service node and connect global mobile user identification in the registration message when setting up, inquiry is pre-stored in the IP address of ownership place Packet data service service node corresponding with global mobile user identification in the address mapping table of visit ground Packet data service service node.
3. the method that connects roaming terminal and ownership place Packet data service service node PDSN according to claim 1, wherein, the operation that obtains the IP address of ownership place Packet data service service node by visit ground Packet data service service node comprises:
In the ownership place authentication and authorization charging server, deposit one or more address mapping table in advance in, comprised the mapping relations between the IP address of user ID and ownership place Packet data service service node in this address mapping table;
In the PPP authorizing procedure, send the request of access to visit ground authentication and authorization charging server by described visit ground Packet data service service node, comprise user ID in the described access request message, and described access request is transmitted to the ownership place authentication and authorization charging server by described visit ground authentication and authorization charging server;
Receive described access request by the ownership place authentication and authorization charging server, inquiry is pre-stored in the IP address of ownership place Packet data service service node corresponding with described user ID in the local address table, and by described visit ground authentication and authorization charging server with the IP address of described ownership place Packet data service service node Packet data service service node with sending to described visit.
4. the method that connects roaming terminal and ownership place Packet data service service node PDSN according to claim 1 wherein, obtains the operation of the IP address of ownership place Packet data service service node by visit ground Packet data service service node, also comprises:
Relatively whether its own IP address identical with the IP address of ownership place Packet data service service node for visit ground Packet data service service node, if identical, then visit ground Packet data service service node directly and roaming terminal connect; If different, then continue described visit ground packet data serving node and described ownership place packet data serving node and set up the PP step of connecting.
5. the method that connects roaming terminal and ownership place Packet data service service node PDSN according to claim 1, wherein, when visit ground Packet data service service node set up with described ownership place Packet data service service node between PP when being connected, also comprise:
Wrap by visit ground Packet data service service node reduction PPP frame and IP, and the IP bag is sent to ownership place Packet data service service node.
6. the method that connects roaming terminal and ownership place Packet data service service node PDSN according to claim 1 also comprises discharging the operation that connects:
Described roaming terminal discharges the session connection with described visit ground Packet data service service node;
Discharge and being connected of described ownership place Packet data service service node by described visit ground Packet data service service node;
Discharge and being connected of wireless network by described visit ground Packet data service service node;
Discharge and being connected of described roaming terminal by wireless network.
7. connect the system of roaming terminal and ownership place Packet data service service node PDSN, comprising:
Connection between the ground Packet data service service node is set up and visited to roaming terminal by wireless network, and and described visit ground Packet data service service node between initiation point-to-point protocol controlling links flow process and authorizing procedure;
Ownership place Packet data service service node is used to set up and visits being connected of ground Packet data service service node;
Visit ground Packet data service service node comprises:
Address acquisition module is used to obtain the IP address of ownership place packet data serving node;
Transceiver module, be used for sending the registration message of PP interface definition to described ownership place Packet data service service node, PP between foundation and the ownership place Packet data service service node connects, and the IP address that will be used to insert in the control flow of address returns to roaming terminal, sets up being connected of described roaming terminal and described ownership place packet data serving node.
8. as the system of connection roaming terminal as described in the claim 7 and ownership place Packet data service service node PDSN, also comprise:
Visit ground authentication and authorization charging server is used for when receiving the access request of described visit ground Packet data service service node described access request being transmitted to the ownership place authentication and authorization charging server, comprises user ID in the described access request message; Be used to receive the IP address of the described ownership place Packet data service service node that the ownership place authentication and authorization charging server returns, and send to described visit ground Packet data service service node;
The ownership place authentication and authorization charging server is used to pre-deposit one or more address mapping table, has comprised the mapping relations between the IP address of user ID and described ownership place Packet data service service node in this address mapping table; Be used for being pre-stored in the IP address of the local address mapping table ownership place Packet data service service node corresponding, and send to visit ground authentication and authorization charging server with described user ID according to the access request inquiry that described visit ground authentication and authorization charging server sends.
9. as the system of connection roaming terminal as described in the claim 7 and ownership place Packet data service service node PDSN, described address acquisition module also comprises:
Module is preserved in the address, is used to pre-deposit one or more address mapping table, has comprised the mapping relations between the IP address of user's global mobile user identification and ownership place Packet data service service node in this address mapping table;
The address lookup module, be used for reading the global mobile user identification that RP connects the registration message when setting up, inquiry is pre-stored in the IP address that ownership place Packet data service service node corresponding with global mobile user identification in the address mapping table of module is preserved in described address.
10. as the system of connection roaming terminal as described in claim 8 or 9 and ownership place Packet data service service node PDSN, described visit ground Packet data service service node also comprises:
The address comparison module, whether be used for the comparison its own IP address identical with the IP address of ownership place Packet data service service node, if identical then direct and roaming terminal connects, otherwise the registration message that sends the PP interface definition is to ownership place Packet data service service node, and the PP that sets up between visit ground Packet data service service node and the ownership place Packet data service service node connects.
11. as the system of connection roaming terminal as described in claim 8 or 9 and ownership place Packet data service service node PDSN, described visit ground Packet data service service node also comprises:
Parsing module, be used for visit ground Packet data service service node set up with described ownership place Packet data service service node between PP when being connected, resolve reduction PPP frame and IP and wrap, and IP wrapped send to ownership place Packet data service service node.
12. the system as connection roaming terminal as described in the claim 7 and ownership place Packet data service service node PDSN also comprises:
Described roaming terminal discharge with described visit being connected of Packet data service service node, and being connected of release and wireless network;
Described visit ground Packet data service service node discharges and being connected of described ownership place Packet data service service node and being connected of release and wireless network.
13. the ground of the visit in session connection system Packet data service service node comprises:
Address acquisition module is used to obtain the IP address of ownership place packet data serving node;
Transceiver module, be used for sending the registration message of PP interface definition to described ownership place Packet data service service node, PP between foundation and the ownership place Packet data service service node connects, and the IP address that will be used to insert in the control flow of address returns to roaming terminal, sets up being connected of described roaming terminal and described ownership place packet data serving node.
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| CN2008101270360A CN101291544B (en) | 2008-06-18 | 2008-06-18 | Method and system connecting roaming terminal and PDSN of home location |
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| CN106161431A (en) * | 2016-06-27 | 2016-11-23 | 乐视控股（北京）有限公司 | Call method for building up and system |
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| WO2007092617A2 (en) * | 2006-02-09 | 2007-08-16 | Starent Networks Corporation | Fast handoff support for wireless networks |
| CN101026546A (en) * | 2006-02-21 | 2007-08-29 | 华为技术有限公司 | Method for realizing packet data session |
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| WO2007092617A2 (en) * | 2006-02-09 | 2007-08-16 | Starent Networks Corporation | Fast handoff support for wireless networks |
| CN101026546A (en) * | 2006-02-21 | 2007-08-29 | 华为技术有限公司 | Method for realizing packet data session |
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